U.K. Ministry of Defence in midst of electronic fight with computer virus. Virus rapidly spread through its computer networks starting Jan. 6. Virus has affected e-mail systems and Internet access but has not jeopardized war-fighting systems. No classified or personal data was compromised, the Ministry said. Virus is one of the most severe attacks the organization has ever faced, a spokeswoman said. Some Navy systems are now up and running, but the Ministry did not have estimate of how many of those systems remain down.”]